FEAT: extras included in handle object, added normal handle mode

[efraespada]

Handling calls from recent history only with nameCaller and handle fields makes hard to start a new call depending on the data model (how contacts or chats are structured: email, id..).

I've included all the extra fields in the handle object:

 override func application(_ application: UIApplication,
                              continue userActivity: NSUserActivity,
                              restorationHandler: @escaping ([UIUserActivityRestoring]?) -> Void) -> Bool {

        guard let handleObj = userActivity.handle else {
            return false
        }
        
        guard let isVideo = userActivity.isVideo else {
            return false
        }
                    
        let nameCaller = handleObj.getDecryptHandle()["nameCaller"] as? String ?? ""
        let handle = handleObj.getDecryptHandle()["handle"] as? String ?? ""
        let chatId = handleObj.getDecryptHandle()["chatId"] as? String ?? ""

        let data = flutter_callkit_incoming.Data(id: UUID().uuidString, nameCaller: nameCaller, handle: handle, type: isVideo ? 1 : 0)        
        data.appName = "Your App Name"
        data.iconName = "AppIcon"
        data.extra = ["id": data.uuid,
                      "chatId": chatId,
                      "fromHistory": "true"]
        
        SwiftFlutterCallkitIncomingPlugin.sharedInstance?.startCall(data, fromPushKit: true)
        
        return super.application(application, continue: userActivity, restorationHandler: restorationHandler)
}

I've also added a normal handle mode for scenarios where a normal number/email is needed instead of the base64 encrypted value.